MIPS32: MoveLocation refactoring

Move32 and Move64 are removed so MoveLocation now handles all cases.
Reason for this are 128-bit (SIMDStackSlot, VectorRegister) moves
which will be added in follow-up patch.

Test: mma test-art-host-gtest
Test: ./testrunner.py --optimizing --target in QEMU

Change-Id: I93496e74874f77337b11b2265aa4b470bc7c6ce2
2 files changed